New Surplus, Unused in original factory packaging.

The Starrett 463 mechanical micrometer head features lock nut, 0-1/2" range, and .001" graduation. 0-1/2” Range, .001” Grad, Plain.

These may have been a custom run from Starrett because instead of the standard flat tip spindle specified on thier website, these heads feature a spherical tip spindle.

Each unit comes with a certificate of authenticity showing that it has been individually inspected. These are plain micrometer heads with no lock nut or ratchet. 


Mfg Part #: 52440

These precision micrometers meet or exceed accuracy and performance requirements of national and international standards, and are traceable to the United States National Institute of Standards and Technology(NIST).


  •  Micrometer Type: Mechanical Micrometer Head
  •  Range (in): 0-1/2"
  •  Graduations (in): .001"
  •  Spindle Material: Steel
  •  Spindle Type: spherical tip 
  •  Thimble Type: Plain
  •  Accuracy (in): +/-.0001"


  •  Starrett satin chrome finish – no glare – resists rust on all reading surfaces
  •  Advanced sleeve design with staggered lines and distinct figures for precise and easy readability
  •  Quick-reading figures
  •  Extremely hard and stable one-piece spindle (the heart of our accuracy and long life)
  •  Micro-lapped measuring face for flatness and squareness
  •  Quick and easy adjustment


The 463 series are made from rust-resistant stainless steel. The reading surfaces are satin finished stainless steel for easy readability.

Range of motion: 1/2" measurable (0-19mm total extension)

Warranty 90-Day Warranty

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Starrett 463P Micrometer Head, 0-1/2" Range w/spherical tip, #52440

  • Item ID: 251508
  • Brand: Starrett
  • Model: 463P
  • Availability: In Stock
  • Condition: Unused Surplus
  • $39.99

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Tags: Unused Surplus